Samsung Galaxy S 5 Android US Cellular Embarqmail.com 2 months old when i first g

Help
When I got this galaxy s5 I would delete mail from inbox and it would go to trash.
2 months later. Now when I delete mail from inbox it does not go to trash. Is there
a cure? My email count is over 3,000 but my inbox is 3 at this time.
Don2048